ORIENTED ELECTROMAGNETIC STEEL PLATE

摘要

The present invention provides a grain oriented electrical steel sheet that may reduce local exfoliation of insulating coating films and thus has excellent corrosion resistance and insulation properties. This grain oriented electrical steel sheet may be obtained by, assuming that a 1 (µm) is a film thickness of the insulating coating at the floors of linear grooves and a 2 (µm) is a film thickness of the insulating coating on a surface of the steel sheet at portions other than the linear grooves, controlling a 1 and a 2 to satisfy the following formulas (1) and (2): 0.3 ¼m ‰¤ a 2 ‰¤ 3.5 ¼m and a 1 / a 2 ‰¤ 2.5